M365 pill is a generic version for name brand Vicodin
manufatured by Mallinckrodt Pharmaceuticals. Vicodin
is a compound pain reliever that consists of Acetaminophen
(Paracetamol) combined with Hydrocodone bitartrate.

Hydrocodone bitartrate is an opioid pain reliever.
Acetaminophen is an analgesic (a pain reliever) and an
antipyretic (a fever reducer) which strengthens
analgetic effects of Hydrocodone.